Place it just before the key visual change, then follow it with a heavy impact for the payoff. A metallic clang beforehand can set up the charge, while a boom after the transformation gives the moment weight and an air horn can close a comic version.
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This three-second clip is a sharp metallic charge effect, built around a bright ringing strike that rises into a pulsing surge. It feels tense and energising, like the moment just before something big happens, with a clean, dramatic edge that cuts through a quiet scene. The sudden lift makes it ideal for a reveal, a power-up or a dramatic pause before the action lands.